tif_atari.c
上传用户:looem2003
上传日期:2014-07-20
资源大小:13733k
文件大小:5k
- /* "$Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_atari.c,v 1.2 2005/12/21 12:23:13 joris Exp $" */
- /*
- * Copyright (c) 1988-1997 Sam Leffler
- * Copyright (c) 1991-1997 Silicon Graphics, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the names of
- * Sam Leffler and Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Sam Leffler and Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
- /*
- * TIFF Library ATARI-specific Routines.
- */
- #include "tiffiop.h"
- #if defined(__TURBOC__)
- #include <tos.h>
- #include <stdio.h>
- #else
- #include <osbind.h>
- #include <fcntl.h>
- #endif
- #ifndef O_ACCMODE
- #define O_ACCMODE 3
- #endif
- #include <errno.h>
- #define AEFILNF -33
- static tsize_t
- _tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
- {
- long r;
- r = Fread((int) fd, size, buf);
- if (r < 0) {
- errno = (int)-r;
- r = -1;
- }
- return r;
- }
- static tsize_t
- _tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
- {
- long r;
- r = Fwrite((int) fd, size, buf);
- if (r < 0) {
- errno = (int)-r;
- r = -1;
- }
- return r;
- }
- static toff_t
- _tiffSeekProc(thandle_t fd, off_t off, int whence)
- {
- char buf[256];
- long current_off, expected_off, new_off;
- if (whence == SEEK_END || off <= 0)
- return Fseek(off, (int) fd, whence);
- current_off = Fseek(0, (int) fd, SEEK_CUR); /* find out where we are */
- if (whence == SEEK_SET)
- expected_off = off;
- else
- expected_off = off + current_off;
- new_off = Fseek(off, (int) fd, whence);
- if (new_off == expected_off)
- return new_off;
- /* otherwise extend file -- zero filling the hole */
- if (new_off < 0) /* error? */
- new_off = Fseek(0, (int) fd, SEEK_END); /* go to eof */
- _TIFFmemset(buf, 0, sizeof(buf));
- while (expected_off > new_off) {
- off = expected_off - new_off;
- if (off > sizeof(buf))
- off = sizeof(buf);
- if ((current_off = Fwrite((int) fd, off, buf)) != off)
- return (current_off > 0) ?
- new_off + current_off : new_off;
- new_off += off;
- }
- return new_off;
- }
- static int
- _tiffCloseProc(thandle_t fd)
- {
- long r;
- r = Fclose((int) fd);
- if (r < 0) {
- errno = (int)-r;
- r = -1;
- }
- return (int)r;
- }
- static toff_t
- _tiffSizeProc(thandle_t fd)
- {
- long pos, eof;
- pos = Fseek(0, (int) fd, SEEK_CUR);
- eof = Fseek(0, (int) fd, SEEK_END);
- Fseek(pos, (int) fd, SEEK_SET);
- return eof;
- }
- static int
- _tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
- {
- return (0);
- }
- static void
- _tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
- {
- }
- /*
- * Open a TIFF file descriptor for read/writing.
- */
- TIFF*
- TIFFFdOpen(int fd, const char* name, const char* mode)
- {
- TIFF* tif;
- tif = TIFFClientOpen(name, mode,
- (thandle_t) fd,
- _tiffReadProc, _tiffWriteProc, _tiffSeekProc, _tiffCloseProc,
- _tiffSizeProc, _tiffMapProc, _tiffUnmapProc);
- if (tif)
- tif->tif_fd = fd;
- return (tif);
- }
- /*
- * Open a TIFF file for read/writing.
- */
- TIFF*
- TIFFOpen(const char* name, const char* mode)
- {
- static const char module[] = "TIFFOpen";
- int m;
- long fd;
- m = _TIFFgetMode(mode, module);
- if (m == -1)
- return ((TIFF*)0);
- if (m & O_TRUNC) {
- fd = Fcreate(name, 0);
- } else {
- fd = Fopen(name, m & O_ACCMODE);
- if (fd == AEFILNF && m & O_CREAT)
- fd = Fcreate(name, 0);
- }
- if (fd < 0)
- errno = (int)fd;
- if (fd < 0) {
- TIFFErrorExt(0, module, "%s: Cannot open", name);
- return ((TIFF*)0);
- }
- return (TIFFFdOpen(fd, name, mode));
- }
- #include <stdlib.h>
- tdata_t
- _TIFFmalloc(tsize_t s)
- {
- return (malloc((size_t) s));
- }
- void
- _TIFFfree(tdata_t p)
- {
- free(p);
- }
- tdata_t
- _TIFFrealloc(tdata_t p, tsize_t s)
- {
- return (realloc(p, (size_t) s));
- }
- void
- _TIFFmemset(tdata_t p, int v, size_t c)
- {
- memset(p, v, (size_t) c);
- }
- void
- _TIFFmemcpy(tdata_t d, const tdata_t s, size_t c)
- {
- memcpy(d, s, (size_t) c);
- }
- int
- _TIFFmemcmp(const tdata_t p1, const tdata_t p2, tsize_t c)
- {
- return (memcmp(p1, p2, (size_t) c));
- }
- static void
- atariWarningHandler(const char* module, const char* fmt, va_list ap)
- {
- if (module != NULL)
- fprintf(stderr, "%s: ", module);
- fprintf(stderr, "Warning, ");
- vfprintf(stderr, fmt, ap);
- fprintf(stderr, ".n");
- }
- TIFFErrorHandler _TIFFwarningHandler = atariWarningHandler;
- static void
- atariErrorHandler(const char* module, const char* fmt, va_list ap)
- {
- if (module != NULL)
- fprintf(stderr, "%s: ", module);
- vfprintf(stderr, fmt, ap);
- fprintf(stderr, ".n");
- }
- TIFFErrorHandler _TIFFerrorHandler = atariErrorHandler;